WRF-1 Chlorine Contact Tank Static Mixer and Flow Meter


SCH Number
Public Agency
City of Corona
Document Title
WRF-1 Chlorine Contact Tank Static Mixer and Flow Meter
Document Type
NOE - Notice of Exemption
Document Description
The chlorine contact tank (CCT) at WRF No. 1 is currently fed by a 36-inch line. Sodium hypochlorite is injected directly into the chlorine contact tank, where it is mixed using a mechanical mixer. The sodium hypochlorite injection point will be relocated to the 36-inch line, just upstream of the tank, and a static mixer will be installed within the line to promote proper mixing. In addition, the installation of a new flow meter on the 36-inch line that can be placed within the buried vault upstream of the static mixer will take place. Isolation valves will either be buried or within the proposed vault.

Contact Information

Aftab Hussain
Agency Name
City of Corona
Job Title
Maintenance Manager
Contact Types
Lead/Public Agency


Citywide, Countywide
Other Location Info
The Water Reclamation Facility (WRF) 1 project site location is on City property located at 2205 Railroad St. Corona, California 92880.

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
State type and class number: State code Class 2 section number 15302.c
Reasons for Exemption
The proposed modifications are contained within the existing infrastructure and will not result in any potential environmental impacts. The project aims to enhance the efficiency of the chlorine tank without introducing any new elements or expanding capacity. Mitigation measures will be employed including insuring that potential noise impacts will be minimized. The modifications are consistent with the existing purpose and capacity of the chlorine contact tank, maintaining its core functionality while improving operational efficiency.
County Clerk


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